Acetylene-purifying composition.



Patentsd Mar. I9, I90I.

(Application led Oct. 28, 189B.)

(No Model.)

Gaone inoLLnitia,bii

AC'ETYILIEN terughalen FN ejooivi Poem-ION@ amino-RF, GERMANY..

srncrrrcsrion forming para of Leiters patentino. 670,354, dates March 19, 1901.

Application led October 28, 1 898.

.to means for purifying acetylene gas, said means being obtained from carbids and having the purpose to remove the impurities and obvia'te.

detrimental'products of the acetylene in one single operation. Hitherto it has been tried to remove the impurities by different operations; butsuch a process is impracticable, for the.I reason that the vpurifying is too complicated to be employed in'practice. Furthermore, experiments were `undertaken to remove impurities of theacetylene by employing oxidation' means. Some of these processes have proved the drawback that during the oxidation of the impurities large quantiu ties of the acetylene gas also were oxidized and changed into invaluable and even dangerous and poisonous carbonio oxids. In

other processes the presence of oxidation' means-as, for instancepchlorid of limesometimes causes dangerous explosive compounds. y n

It has been proposed to purify acetylene by a treatment with acid solutions of metal salts, whereby indeed these solutions remove the 'largest part of thev impurities; but practice has shown that the manner of their-employment caused a number of inconveniences, which the present `application is proposed to The process of employingsolutions through which the acetylene is conducted for purifying purposes is based upon deficient principles, for the reason that considerable losses of pressure are resulting..v These losses are of importance foracetyle'ne lighting, as owing to the small size of the' burner-openings the form of the flame is highly influenced and the iiame constantly' .ti-embles, a fact to be borne in mind, owing to the small pipes vemployed.

with acetylene-lighting' plants, in .which theleast shocks are noticed much more than in Serial No. 694,840. (No specimens.)

the large tubes employed with the ordinary gas-lightingsystem. l

The process of purifying acetylene gas by means of acid-metal solutions has thedrawback that in spite -`of the purifying capacity of these solutions it was hitherto not possible to fully remove the air, reducing thelightin'g dling of the acetylene. To do away with these drawbacksis the chief purpose of my invention, and' this purpose is attained'by the purifying means hereinafter fully described, or, more precisely, by'xthe employment of the purifying mass described hereinafter and forming the su bject-matter of the claims stated at the end of this specification. This purifying is based upon another principle thanthe purifying by means of acid-metal solutions, inasmuchA as mypurifying substance is employed invia compact form. The

der cannot eect a thorough purifying, owing to the absence of water. i -The object of my invention is to attain a fine distribution of the purifying metal salts over a porous body.

This mass, in combination with mechanically Another manner by capacity and `rendering dangerous the hanmetal salts when employed in form of powpurifying substances withv salts melted in their crystal Water, eventually adding a small quantity of acid and cooling the mixture,

whereby the same becomes stiff, thus' forming a compact body which can be crushed or brought into powder form of .any size and used for purifying acetylene by conducting the gas through the mass. The following mixture, for instance, has been'found especially suitable for the said purpose of purifying acetylene.- The mixture is produced in the manner hereinafter described as example;

but Iiespecially declare that I do not limitl Y myself to these examples.`

- ter.

sulfate of soda (NaHSO4) are some fossil meals absorbing very much and.l

some very little liquid.

-Second example: 3.52 pounds sulfate of sodium free of water are solved in 3.96 pounds ,sulfuric acid or hydrochlorid acidv of five'per cent., the latter beingiin Warm state. As soon as the solution is obtained it gets cooled and a crystallic proportionally-dry pulverizable' mass is formed in which the Water is bound by the sulfate of sodium in form of crystallisation-Water.

. Thirdexample: Twenty-two pounds of acid melted and 2.2 pounds sulfate of mercury then added to this melted mass,lv The same is cooled, and after the solidification it gets ground, in whichpulverized form it is apt to be employed. The sulfuricacid of the acid sul-y fate acts ina similar way as the `bound Wa- Besides, the mass absorbs some water from the air and is then as fit for the reaction as the mass in the irsta'ndsecond examples.

Fourth example; An acid-as, forvinstance,vv

chromic acid, oxalic acid, or the like-is melted, and a saltsuitable forpurifying purposes-for instance, chlorid of chromiumis dissolved in the molten acid. The resulting substance is crushed and employed.v

Eventually a small quantity of Water might be added. .The vpurifying mass thus produced is advantageously employed for acetylene-purifying and much more suitable than the salts being in solution. I cannot state distinctly owing to what reason the edect is a better one; butI suppose that the powder-ons form, or, more precisely, the fine distribution of the acting substance, is the i'easonfor the great eiiiciency .of my purifying mass.

To give an instance, about fifty grains of a metallic salt suitably distributed or mixed in the above-described manner suffice to entirely purify about twenty cubic meters of acetylene of average condition. The effect upon the acetylene itself is so slight that only about .0.3 per cent. of the same becomes transformed into otherv organic compounds, while when strong oxidation means-, as, for instance, chlorid4 of ironare employedten per -centQof acetylene is lost by the oxidation.

To completely purify the acetylene, it suices to conduct the same through thin layers of the heretofore-described substances; but in practice it is advantageous to arrange these esta layers in an apparatus allowing the insertions# oflarge quantities of purifyingmass. There-z by the" purifying, in first line,

is more effective, and, secondly, an apparatus Worksl dur-ing a longr time. Th'isisavery important point, inasmuch as the aforedescribed mass, leven -When highly superposed, does notoe'r -any resistance to the passing gas, and consequently'no loss of pressure can With .respectto the liquid purifying this be caused.

fact is' a certain advantage, as a high column l of liquid cannot be employed, owing tothe enormous losses of pressure which would be the .unavoidable'reason thereof.

' In the following Iv beg to describe an appapurifying mass, and especially for purifying of acetylene.

ratus, which in rst line must be transportable, must have, What concerns its covering,

i a compact mantle;l in second line, because 8o vratus serving to; take up the above-described y being suitable Suchau appa` destined for acid-purifying it .must contain an innerv acid-proof vessel for taking up the purifying mass to be employed, and at last it must contain a certain space for taking up the gas in regulator for the sudden variations of pressure within the generator. The following ap- I paratus corresponds to these conditions. ",Ihe apparatus consists of an outer metal vessel a, for instance, of cylindrical form. This outer vessel surrounds an inner vessel b, of acidproof material-for instance, clay, enameled iron, or the like. This inner vessel b has the purpose to take up the purifying mass c. In

cases 'where the dropping out-of the purfying'liquid may be feared, which practically is improbable, a shell or pan d, of acid-proof material, can be arranged in the outer vessel. This shell or pan d, if desired, may be connected to a projecting-border of the outer vessel. The place of con-tact suitably is rendered tight.

vessel b is-provided With The latteris suitlocating immediatelyabove order to serve simultaneously as a through which the gas enters The whole is closed by a tight. cover g andh indicate the gas-pipes. The lower the entrance-apertures t' a layei.1 ofvcru'shed stone for the purpose of preventing the dropping down of the purifying mass. AUpon this layer of stone the purifying mass isarranged.-

The upper space fying vessel and a layer of asbestos, wool, or the like forgthe purpose to retain the acid or water vapors eventually withdrawn bythe passing gas.

Having thus lfully describedthe nature of my said' invention, what I. de sire to secure by Letters Patent of the United States is 1. Anlass for refining of acetylene, consisting o! a dry compound of acid-metal salts and porous substances as as eet forth.

2. A mass for refining of acetylene, consistla between 'the inner puri-P the cover islled out with fossil meal or the like,

ing of au @Leid-metal salt and a salt .centain- `the fornerlymeited'and thereafterso1idified te ing cryet'allization-water, said acid-metal salt acid compound, as set forth.

being solved md earxied by the crystalliz'a- In Witness WhereofI have hereunto set my tien -Water oi the latter salt, whereby the hand in presence of twewitnesses. l whole forms 1n general a dry lhass, as yset GEORG DLLNER forth. v Y',

3. A mass for refining of aeetylene,- eonsist- Witnesses: .ing of a metal salt and asolid acid compound, l C. H. DAY,

the metalsalt being,r solved and ear1iedby FRITZ SPERLING. 

